A. N. Morozov
Marine Hydrophysical Institute of RAS, Sevastopol, Russia
Abstract
The results of measurements carried out on May 27 – 28, 2016 in the coastal water of the Black Sea near Simeiz settlement (the South Coast of Crimea) are discussed. The fluctuations in the depth of the seasonal thermocline with 9,6 h period and 1,5 m amplitude are recorded. The current velocity averaged over the measuring layer decreases almost linaarly as it approaches to a shore with a coefficient equaled to a 6 (cm/s)/km. The maximum of profile of the stations averaged velocity profile is observed under seasonal pycnocline. The maxima of the averaged profiles of buoyancy frequency and shear are noted in the center of the seasonal pycnocline. In 40 m bottom layer, the averaged current velocity profile is well reproduced by a logarithmic dependence. The average measured values of the shear increase near the bottom. The coefficients of vertical turbulent diffusion and the dissipation rate of turbulent kinetic energy exhibit exponential behavior, they increase by about an order of magnitude in the layer 10-40 m to the bottom.
Keywords
seasonal thermoclinem, bottom layer, vertical current structure, ADCP, the Black Sea